Often when the converter is plugging, it will glow red hot with the engine running. Other than that, you need to check back pressure at the O2 sensor port.

Do u happen to know what he correct pressure is or should be

There is no specific pressure. You are checking to see if pressure is able to exit the exhaust. Therefore, pressure is low if the converter isn't plugged.

Ooooh i see thank you for the help the smell was makeing my daughter throw up everytime i got on the highway ill do. Pressure test tomorrow but lets say The pressure is low its not. cloged what els could it be

If you are getting a sulfur smell, chances are it is the converter.

Alright thank you very much for youre time its helped

Glad to help. Let me know how things go for you.